Gamma Decay Contents: What it is Whiteboard
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Transcript of Gamma Decay Contents: What it is Whiteboard
Gamma Decay
Contents:•What it is
•Whiteboard
TOC
23994Pu 239
94Pu + Gamma Decay:
Nucleus has energy levelsEnergy of transition emitted as a high energy photonUsually after a beta or alpha decayMany energies possible Stopped by meters of leadUsed for food irradiation
Whiteboards: Gamma Decay
1 | 2
TOC
W
Parent mass = 239.054238 uProduct mass = 239.052157 uMass defect = parent - products = 0.002081 uEnergy of radiation = (0.002081u)(931.5 MeV/u) = 1.94 MeV
23994Pu --> 239
94Pu +
239.054238 --> 239.052157What is the energy of the gamma emitted?
1.94 MeV
W
Mass of 3.92 MeV = (3.92 MeV)/(931.5 MeV/u) = 0.004208266 uExcited parent is more massive than this by that amountParent mass = 245.065484 + .004208266 u = 245.069692 u
24596Cm --> 245
96Cm +
???.?????? --> 245.065484What is the excited mass of the parent, if a 3.92 MeV gamma photon is emitted?
245.069692